How to Identify Phlogopite Mica Powder?

As a Phlogopite Mica Manufacturer, share with you.

Phlogopite is characterized by the complete cleavage of mica, yellow-brown color and golden reflection. The difference with muscovite is that it can be decomposed in boiling sulfuric acid and produce a milky solution at the same time, while muscovite cannot. The general characteristics of phlogopite are the same as muscovite, and it is distinguished from other mica based on its brown and light golden color. The identification method for biotite, which is similar in color, is that its color is lighter than biotite. Tear the two into thin flakes and place them on white paper for comparison. Phlogopite is pale yellowish brown, while biotite is grayish green or smoky. The exact identification of colorless or other colored phlogopite requires the help of a microscope.

Muscovite Mica

Phlogopite powder is widely used in building materials industry, fire protection industry, fire extinguishing agent, welding rod, plastic, electrical insulation, papermaking, asphalt paper, rubber, pearlescent pigment and other chemical industries. Ultrafine phlogopite powder is used as a functional filler for plastics, coatings, paints, rubbers, etc., which can improve its mechanical strength, enhance toughness, adhesion, aging resistance and corrosion resistance. The industry mainly uses its insulation and heat resistance, as well as its resistance to acid, alkali, pressure and stripping, as an insulating material for electrical equipment and electrical equipment.

Physical index

Phlogopite is usually yellow, brown, dark brown or black; it is glassy, and the cleavage surface is pearly or semi-metallic. The transparency of muscovite is 71.7-87.5%, and the transparency of phlogopite is 0-25.2%. The Mohs hardness of muscovite is 2-2.5, and that of phlogopite is 2.78-2.85.

When muscovite is heated at 100-600 degrees, the elasticity and surface properties are unchanged. After 700-800 degrees, the dehydration, mechanical and electrical properties will change, the elasticity will be lost and become brittle, and the structure will be destroyed at 1050 degrees; Phlogopite At about 700 degrees, the electrical performance is better than muscovite.

Chemical composition

The chemical formula of phlogopite is KMg3[AlSi3O10][F,OH]2, the main chemical composition: SiO2-36-45%.Ag2O3-10-17%.MgO-19-27%.K2O-7-12%.Fe2O3- 3-7%.H2O-0.3-4.5%, containing a small amount of Fe, Ti, Mn, Na and F.

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